. (1987): Structural design of the developing and mature pericarp of Hibiscus sabdariffa L. - Proc. Indian Acad. Sci. (Plant Sci. ) 97 (1): 17-23.
Structural design of the developing and mature pericarp of Hibiscus sabdariffa L
Drought and high temperature are two major factors limiting crop production. The two stresses occur together in many regions of the world but they usually are investigated separately. Irrespective of the genotype, growth or treatment conditions, grain growth was severely reduced when wheat plants were exposed to high temperature, drought and combination of both the stresses during endosperm cell division. The extent of thermal as well as drought induced disruption of grain development, however was dependent on genotype. This structural data support the hypothesis that high temperature and drought during endosperm cell division reduces grain sink potential and subsequently mature grain mass, mainly by disrupting cell divisions in peripheral and central endosperm and thus reducing endosperm length and breadth to a considerable extent. The interaction of high temperature and drought stresses resulted in stronger reduction of pericarp thickness and endosperm size than either stress alone.
, B. , Hu , B. , Qin , Y.H. , Zhao , J.T. , Wang , H.C. & Hu , G.B. ( 2015 ): Transcriptomic analysis of Litchi chinensis pericarp during maturation with a focus on chlorophyll degradation and flavonoid biosynthesis
Authors:N. Li, Y. Zong, B.L. Liu, W.J. Chen, and B. Zhang
Purple pericarp is an interesting and useful trait in Triticum aestivum, but the molecular mechanism behind this phenotype remains unclear. The allelic variation in the MYB transcriptors is associated with the phenotype of pigmented organs in many plants. In this study, a MYB transcription factor gene, TaMYB3, was isolated using homology-based cloning and a differentially expressed gene mining approach, to verify the function of the MYB transcriptor in the purple pericarp. The coding sequence of TaMYB3 in cultivar Gy115 was the same as that in cultivar Opata. TaMYB3 was localized to FL0.62–0.95 on chromosome 4BL. The TaMYB3 protein contains DNA-binding and transcription-activation domains, and clustered on a phylogenetic tree with the MYB proteins that regulates anthocyanin and proanthocyanin biosynthesis. TaMYB3 localized in the nuclei of Arabidopsis thaliana and wheat protoplasts after it was transiently expressed with PEG transformation. TaMYB3 induced anthocyanin synthesis in the pericarp cells of Opata in the dark in collaboration with the basic helix–loop–helix protein ZmR, which is also the function of ZmC1. However, TaMYB3 alone did not induce anthocyanin biosynthesis in the pericarp cells of the white grain wheat cultivar Opata in the light after bombardment, whereas the single protein ZmR did. Light increased the expression of TaMYB3 in the pericarp of Gy115 and Opata, but only induced anthocyanin biosynthesis in the grains of Gy115. Our results extend our understanding of the molecular mechanism of the purple pericarp trait in T. aestivum.
Authors:Suresh Nampoothiri, S. Binil Raj, A. Ranjith, A. Prathapan, and Aandikkannu Sundaresan
For the first time a simple, sensitive, rapid, precise and accurate HPTLC method has been established for quantification of belleric acid in Terminalia bellerica (TB) fruit pericarp and its formulations. Silica gel plates were used with toluene-ethyl acetate-methanol-formic acid 3:3:1.4:0.2 (v/v) as mobile phase, and densitometric evaluation was performed at 205 nm. The method was validated for precision, repeatability, and accuracy. Average recovery of belleric acid at three levels (98.67, 100.2, and 100.90%) showed the reproducibility of the method was excellent. The calibration plot was linear in the range 250–1250 ng per band. The method could be easily adapted for high-throughput screening and for quality control of TB and its formulations.
, K. S. (1980): Origin, development and structure of spiny projections on the pericarp of Datura innoxia Mill. - Feddes Repertorium 91 : 89-93.
Origin, development and structure of spiny projections on the pericarp of Datura
Pandey , A. K. and Kumari , A. ( 2007 ): Anatomical patterns of pericarp in Asteraceae . – In: Chauhan , S. V. S. , Rana , A. and Chauhan , S. (eds): Plant reproductive biology and biotechnology . Aavishkar Publisher , Jaipur , pp. 64